Surface-gage



(No Mo-del.)` v C. G. OSTEMAN.

SURFACE GAGE. No. 396,109. l Patented Jeml 151889.

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UNITED STATES PATENT 'O'E'EicE.l

CARL G. OSTEMAN, OF BOSTON, MASSACHUSETTS.

SURFAC E-GAG E.

SPECIFICATION forming' part of Letters Patent N o. 396,109, dated January 15, 18.89. APplCatOll filed September 6, 1888. Serial No. 284,699. (No model.)

To all 11172/0772/ it may concern:

Be it known that I, CARL G. OSTEMAN, of Boston, in the county of Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Surface-Gages, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and usc the same, reference being had to the accompanying' drawings, forming' part of this specification, in which- Fig'ure 1 is a front elevation of my improved gage, certain parts being' shown in vertical transverse section taken on line @c in Fig'. 2; Fig'. 2, a side elevation of the gage, a portion of the body being broken away to show the worm; Fig'. 3, a top plan view of the gage in posit-ion for use; Fig. 4, aside elevation show ing the gage in use on a standard, the standard being represented as broken off 5 and Fig. 5, a top plan view of the saine.

Like letters and iigures of reference indicate corresponding parts in the different iigures of the drawings.

My invention relates to that class of gages which are employed in ascertaining inequali-v ties in plane surfaces; and it consists in certain novel features, as hereinafter fully set forth and claimed, the object being to produce a simpler, cheaper, and more effective device of this character than is now in ordinary use.

The nat'nre and operation of the improvenient will be readily understood by all conversant with sueh matters from the following'v explanation.

In the drawing's,A represents the body of the gage considered as a whole, and B the pointer. v

The body A consists of a bed-plate, c, the under side of which is an accurate plane surface. Vertical standards l1 (l are united at their upper ends and cast integral with the bed-plate A horizontally-arranged shaft, m, is fitted to revolve in the upper end of the standard l), said shaft being' provided with a head, f, (see Fig. 1,) on one end and screwthreaded at y1.' on the opposite end to receive a nut, H. A lateral hole or opening', 7L, (see Fig. 1,) is formed in the shaft in. near the head f to receive the pointer B. Loosely dis- I posed on the shaft m, and fitted to revolve closely in a socket formed to receive it in the upper ends of the standards b (bis a vertically-arranged worin-gear, fr. (See Fig'. l.) The outer face of the gear 7u .is provided with a transverse slot, (not shown,) in which the pointer B rests and prevents said gear from revolving' on the shaft m. A vertically-arranged worm, 15, provided with a rosette, 25, is tted to revolve in the top of the standard d, its teeth intermeshing with the teeth of the g'ear as shown in Fig. 2.

In the use of my improvement the pointer B is disposed in the opening' 71y in the shaft m and the nut H turned onto the screw-threaded end of said shaft, thereby causing the head f to clamp said pointer securely in the slot in the outer face of the gear 7.". By turning' the rosette 25 the worm 15 will cause the gear k to rotate, carrying with it the shaft in, and moving' the pointer I3 a correspomling' distance.

It will be readily understood that by using' a worin and gear .for adjusting' the pointer, as described, it is securely held in position, and is not liable to be accidentally displaced.

In the modication shown in Figs. 4. and 5 the bed-plate .e

and standards Z) d are dispensed with, and a clamping-arm, p, (see Fi 5,) is formed on the body, which is adapted to inclose adetachable standard, K, and in which the shaft lm. is also journaled. lVhen the nut H is turned onto the shaft, as described, it engages said arm and Aforces it against the standard K, thereby securely holding the gage in position.

Haying thus explained my invention, what I claim is- I 1. In a sin'faee-gage, the combination of a body7 a shaft journaled in said body and provided with an opening for receiving' a pointer, a worm-gear on. the shaft, provided with a liiointer-groove, a worm in said body for actuating said g'ear, a nut on the shaft, whereby the pointer maybe clamped onto said groove, and means vfor securing said body to a base or support, substantially as set forth.

2. In a surface-gage, the combination of a standard, a body provided with a clampingarni for securing' it to said standard, a shaft journaled in said body and arm and provided IOO VlO

15 Ciampi11g-army,iheshnfinzhionrnnhfd in snid i with :t transverse opening;l for receiving :L pointer, a \\'or1ngem disposed on said shzift and itted to revolve in Said body, Suid gear being' provided in its outer tace with a mins- Verse slot for receiving sind pointer, :L Worm fitted to revolve in said body and rotative Said gear, and a lnut adopted to be turned' onto said shaft, whereb)Y said body may be (damped onto srl-id steinizird mid smid pointer clamped against said 'nn1-gefn and 'prevent it troni revolving' on ihe Shaft as the worm is turned, Snbstnll'inily :is set forth.

$3. In :i Snrli'neeguge, the standard K, in eoinlfiiinition- Vwith the bodgv A, having the arm and body, the pointer disposed in im opening in Said shaft, the Worm-gear r., 'fitted to rota-te in said body and provided with :t Slot in which. said pointer may rest, the worm 15, jmirnitied in said body in engagementwith Suid gear, and provided with the rosette 25, :uid the nut if, adapted to be turned onto Said shaft, whereby Said body may be clamped in position on said Standard sind Said pointer eimnped against said gem', snbs'ztiltizdly :LH described.

CARL G. OS'VIEMAN. XVtnesses:

(t A. SHAW, VH. '1). STEVENS. 

